• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

An investigation to find out the effect of salt solution concentration on potato tissue.

Extracts from this document...


An investigation to find out the effect of salt solution concentration on potato tissue. Name: Amandeep Ghuman Class: 11.2.B. Teacher: Mr.Edwards/Mrs.Kingwell Aim: I am trying to find out how different salt solution concentrations affect potato tissue. Input Variable: I am going to change the salt solution concentration. To create a fair test certain aspects of the experiment will have to be kept the same whilst one key variable is changed. I have chosen to vary the concentration of the salt solution. This will give me a varied set of results from which I hope to make a decent conclusion. If any of the non-variables are not kept constant it would mean it would not be a fair test. For instance if one of the potato chips was 1cm longer the surface area of the chip would be larger and there would therefore be more space for osmosis to occur. Doing all the tests at one temperature will control the temperature. For the purpose of my experiment I am going to do all the experiments at room temperature. The volume of the solution that the potato chips are kept in must be fair. The must be totally covered in the solution, and the amount of solution will be kept the same because all the potato chips are the same size. I am also going to use the same balance to weigh my potato chips. This is because the measurements may slightly vary between scales. ...read more.


I will also be washing all the equipment with water to protect any germs getting to any student. The potato is must clean equipment because the potato could be very dirty and very unhygienic, so the potato must be thoroughly washed before touching it. I had to ensure that every time I handled the potatoes my hands were clean and dry. This was to stop any kind of contamination and made sure that I did not pass on any extra water onto the potato. Whilst cutting the potato, extreme care and precision had to be taken with the cork borer and knife as it is very sharp and could easily cause a serious wound. Apparatus: -Test tube rack - Six test tubes - Cork Borer - Weighing Scale - Tile - Potatoes - Six potato chips - Measuring Cylinder - Salt Concentration - Stopwatch - Distilled water - Knife Main Practical: Results Table: Practical 1: Test Tube Salt Solution (M) Mass Before (g) Mass After (g) Time (Hours) 1 0 2.5 3.0 2:45 2 0.2 2.4 2.5 2:45 3 0.4 2.4 2.2 2:45 4 0.6 2.6 2.1 2:45 5 0.8 2.6 2.0 2:45 6 1 2.4 1.9 2:45 Practical 2: Test Tube Salt Solution (M) Mass Before (g) Mass After (g) Time (Hours) 1 0 2.5 3.0 2:50 2 0.2 2.5 2.6 2:50 3 0.4 2.5 2.1 2:50 4 0.6 2.4 1.8 2:50 5 0.8 2.4 1.7 2:50 6 1 2.4 1.6 2:50 Graph Analysis/Conclusion: The evidence obtained from this investigation supports the prediction I made. ...read more.


not to 0.00g but to 0.0000g. The procedure I followed turned out to be correct. My data had no errors and the experiments turned out to be a success. This was because I kept all the potato chips in their concentrations for about the same time length. Also I kept the mass of each potato chip roughly the same, and I kept them all in 20cm3 of solutions. For next time I could make it more accurate by measuring the length of the potato chips as well as the mass. I also could have extended the experiment by using more salt solution concentrations, for example I could have used 1.2, 1.4, 1.6, 1.8 and 2.0m salt solutions which would have produced more accurate results and would have varied my results more. There were not any out of the ordinary results, but some were not as close to the line as others. This may have been caused by human error. When the potato chips were removed from the test tubes and dried I may well have dried some potatoes more thoroughly than others and so some would have more excess water, which would add to the mass. If the experiment was repeated I would have found another way to dry the potatoes that would ensure that all were dried in the same way for the same time. I didn't find any anomalous results, so I didn't have to repeat the experiment more than twice. However with all this said I think that the experiment was truly successful and I was very pleased with the complete comparison of my results with my initial prediction. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our GCSE Life Processes & Cells section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related GCSE Life Processes & Cells essays

  1. Marked by a teacher

    Investigate the effect of surface area on osmosis in potato tissue.

    4 star(s)

    the mass will decrease. Conclusion: These results fit in well with the results I expected to get. Some of the points are not exactly on the best-fit line shown on the graph below but still follow the basic pattern the line sets.

  2. Investigating the Effect of Concentration on the Rate of Osmosis in Potato Tissue.

    Using a potato corer, a long 'cylinder' of potato was taken from a potato and divided into 15 equal pieces using a scalpel, of similar size and shape. These were then divided into 5 separate groups, one group for each different solution used (i.e.

  1. Lab Research Paper. Just a Pinch of Salt and a Dash of Bacteria: the ...

    The salt and the water were mixed together to create the desired concentrations of salt water. Six paper filter disks were added to each beaker, and they were soaked overnight. The final part of the procedure was creating the experimental test plates.

  2. Osmosis coursework. The aim of this investigation is to find the best concentration ...

    Set up all the equipment 1. Put on goggles 2. Make the solution with the salt solution and distilled water 3. Pour the solution into 5 specimen tubes 4. Cut the potatoes into halves 5. Take the cork borer and stick it into the potato 6.

  1. Osmosis investigation

    This means that the water was not pushing as hard against the cell wall. The first 3 solutions, 0.0m-0.4m had osmosis going in the same direction and I know this because they all gained in mass. This is shown on the graph by all three's average mass change being plotted above 0.

  2. The endeavour of this investigation is to ascertain if there is any effect of ...

    to the same force as the wall is pushing back; they then are equal forces and cancel out. Therefore there is no more movement of water. Water potential (): this is a figure worked out from the equation; water potential = solute potential + pressure potential ().

  1. Enzyme Practical

    a negative gradient from the optimum point, and the alkaline side of graph would have looked like the acidic side.

  2. Discover what effect water with different NaCl concentrations have on potatoes, and find out ...

    Potato cells in section "A" will go turgid, because there will be plenty of water pushing against the cells cell walls. It is impossible for me to predict the isotonic point, because I don't know the molarity of the potato cell.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work